Hadith 4888
Narrated Muawiyah: I heard the Messenger of Allah ﷺ say: If you search for the faults of the people, you will corrupt them, or will nearly corrupt them. Abud Darda said: These are the words which Muawiyah himself from the Messenger of Allah ﷺ, and Allah benefited him by them.
Hadith 4889
Narrated Miqdam ibn Madikarib ; Abu Umamah: The Prophet ﷺ said: When a ruler seeks to make imputations against the people, he corrupts them.
Hadith 4890
Narrated Abdullah ibn Masud: Zayd ibn Wahb said: A man was brought to Ibn Masud. He was told: This is so and so, and wine was dropping from his beard. Abdullah thereupon said: We have been prohibited to seek out (faults). If anything becomes manifest to us, we shall seize it.